[Usability Issue] Navigating within the prompt area using the arrow keys

Is there a better way to navigate around inside the prompt area?

For example if I write a few paragraphs, and then I want to go back to the beginning of the prompt (i.e. first char of first line), pressing home key only takes you back to the beginning of the line you're on. Pressing the up key takes you to your previous message. You can hold left arrow, but it's tedious and slow.

This is in "insert mode". If I esc to "normal mode", I can't use the arrow keys for navigation at all, and have to use vim movement keys (which I'm personally not a big fan of).

It would also be great if I could click around to move my cursor, but I realize that's probably not possible due to the way terminals work.